<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <style>
        #impo{
            text-align: center;
        }
        .nav{
            text-decoration: none;
            text-align: center;
            color: black;
            border-right: solid 1px;
            padding: 0 15px;
        }
    </style>
    <title>样式表的层叠</title>
</head>
<body>
    <div id="impo"> 
        <a href="#" class="nav">首页</a>
        <a href="#" class="nav">内容</a>
        <a href="#" class="nav">查看图片</a>
        <a href="#" class="nav">练习我们</a>
        <a href="#" class="nav" style="border: none;">反馈意见</a>
    </div>
</body>
</html>